package com.demo.day08;

/**
 * Created by Administrator on 2017/6/15.
 */
public class Calculator{
        private static int result; // 静态变量，用于存储运行结果
        public void add(int n) {
            result = result + n;
        }
        public void substract(int n) {
            result = result - n;  //Bug: 正确的应该是 result =result-n
        }
        public void multiply(int n) {
        }         // 此方法尚未写好
        public void divide(int n) {
            result = result / n;
        }
        public void square(int n) {
            result = n * n;
        }
        public void squareRoot(int n) {
            for (; ;) ;            //Bug : 死循环
        }
        public void clear() {     // 将结果清零
            result = 0;
        }
        public int getResult() {
            return result;
        }
}
